Influence of LED irradiance on flexural properties and Vickers hardness of resin-based composite materials.

Hdl Handle:
http://hdl.handle.net/10147/124110
Title:
Influence of LED irradiance on flexural properties and Vickers hardness of resin-based composite materials.
Authors:
Bhamra, G S; Fleming, G J P; Darvell, B W
Affiliation:
Materials Science Unit, Division of Oral Biosciences, Dublin Dental School & Hospital, Trinity College Dublin, Lincoln Place, Dublin 2, Ireland.
Citation:
Influence of LED irradiance on flexural properties and Vickers hardness of resin-based composite materials. 2010, 26 (2):148-55 Dent Mater
Journal:
Dental materials : official publication of the Academy of Dental Materials
Issue Date:
Feb-2010
URI:
http://hdl.handle.net/10147/124110
DOI:
10.1016/j.dental.2009.09.008
PubMed ID:
19837453
Abstract:
To investigate the effect of irradiance through choice of LED light-curing unit (LCU) and fiber-optic tip on the mechanical properties of methacrylate resin-based composites (RBCs).; Rectangular bar-shaped specimens (25 mm x 2 mm x 2 mm) of four RBCs, irradiated from one side for the manufacturer's recommended times with one of two LED LCUs, and with either 8 or 13 mm tip diameter, were tested in three-point bend for flexural strength and modulus of elasticity; Vickers hardness was measured on top and bottom surfaces, on overlapped and non-overlapped irradiation sites. The effects and interactions of all factors were examined by analysis of variance.; While the materials tested differed significantly for all properties (P < 1 x 10(-6)), there was no significant effect for LCU, tip, or irradiance for flexural strength or modulus of elasticity. For hardness, the only significant effect overall was due to irradiance on the bottom surface.; Both LCUs and both tips could be used to give adequate top surface hardness, but the recommended maximum increment thickness is too great for adequate cure at the bottom with the tested LCUs at the recommended times. An extended experimental design would be valuable to test behavior at much elevated irradiances.
Item Type:
Article
Language:
en
MeSH:
Composite Resins; Curing Lights, Dental; Dental Stress Analysis; Elastic Modulus; Hardness; Light-Curing of Dental Adhesives; Materials Testing; Pliability; Semiconductors
ISSN:
1879-0097

Full metadata record

DC FieldValue Language
dc.contributor.authorBhamra, G Sen
dc.contributor.authorFleming, G J Pen
dc.contributor.authorDarvell, B Wen
dc.date.accessioned2011-03-10T12:45:45Z-
dc.date.available2011-03-10T12:45:45Z-
dc.date.issued2010-02-
dc.identifier.citationInfluence of LED irradiance on flexural properties and Vickers hardness of resin-based composite materials. 2010, 26 (2):148-55 Dent Materen
dc.identifier.issn1879-0097-
dc.identifier.pmid19837453-
dc.identifier.doi10.1016/j.dental.2009.09.008-
dc.identifier.urihttp://hdl.handle.net/10147/124110-
dc.description.abstractTo investigate the effect of irradiance through choice of LED light-curing unit (LCU) and fiber-optic tip on the mechanical properties of methacrylate resin-based composites (RBCs).-
dc.description.abstractRectangular bar-shaped specimens (25 mm x 2 mm x 2 mm) of four RBCs, irradiated from one side for the manufacturer's recommended times with one of two LED LCUs, and with either 8 or 13 mm tip diameter, were tested in three-point bend for flexural strength and modulus of elasticity; Vickers hardness was measured on top and bottom surfaces, on overlapped and non-overlapped irradiation sites. The effects and interactions of all factors were examined by analysis of variance.-
dc.description.abstractWhile the materials tested differed significantly for all properties (P < 1 x 10(-6)), there was no significant effect for LCU, tip, or irradiance for flexural strength or modulus of elasticity. For hardness, the only significant effect overall was due to irradiance on the bottom surface.-
dc.description.abstractBoth LCUs and both tips could be used to give adequate top surface hardness, but the recommended maximum increment thickness is too great for adequate cure at the bottom with the tested LCUs at the recommended times. An extended experimental design would be valuable to test behavior at much elevated irradiances.-
dc.language.isoenen
dc.subject.meshComposite Resins-
dc.subject.meshCuring Lights, Dental-
dc.subject.meshDental Stress Analysis-
dc.subject.meshElastic Modulus-
dc.subject.meshHardness-
dc.subject.meshLight-Curing of Dental Adhesives-
dc.subject.meshMaterials Testing-
dc.subject.meshPliability-
dc.subject.meshSemiconductors-
dc.titleInfluence of LED irradiance on flexural properties and Vickers hardness of resin-based composite materials.en
dc.typeArticleen
dc.contributor.departmentMaterials Science Unit, Division of Oral Biosciences, Dublin Dental School & Hospital, Trinity College Dublin, Lincoln Place, Dublin 2, Ireland.en
dc.identifier.journalDental materials : official publication of the Academy of Dental Materialsen
dc.description.provinceLeinster-
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